脱硫脱硝电源中高频高压交流电源的实现

Realization of High Frequency & High Voltage AC Power Supply In Desulfurization & Desalpetration Power Source

本文论述了脱硫脱硝高压交直流叠加电源中的交流电源部分,分析了电路工作在容性及感性状态下的工作原理和实验波形。为了提高系统的脱硫效率,有必要提高开关频率,但是提高开关频率必然导致器件损耗加大,因此需要采用软开关方法降低开关损耗。本文介绍了电路工作在感性条件下,利用全桥移相软开关控制方法实现开关管的软开通与软关断。

The AC power source of desulfurization and desalpetration power source, etc. a high DC power source added by a high voltage and high frequency AC power source, is presented in this paper. The principle and the waveforms of the system are analyzed. In order to raise the efficiency of the system, it is necessary 10 raise switch frequency. But it will lead to increase switch loss, so soft switching is needed. In the paper and in the induction condition, using phase-shifted full-bridge control method to realize soft turnon and soft turn—off is analyzed.